Centre gathering bit of market research (5,5)
I believe the answer is:
focus group
'bit of market research' is the definition.
I know nothing about this answer so I can't judge whether this works.
'centre gathering' is the wordplay.
'centre' becomes 'focus' (synonyms).
'gathering' becomes 'group' (I've seen this in another clue).
'focus'+'group'='FOCUS GROUP'
Can you help me to learn more?
(Other definitions for focus group that I've seen before include "set for discussion" , "Four cups go (anag)" .)